From 524093ce1e7e992254b5ab58b8743f96a9184fde Mon Sep 17 00:00:00 2001
From: theoretical <theoreticalbts@users.noreply.github.com>
Date: Wed, 31 Dec 2014 14:27:55 -0500
Subject: [PATCH] Implement chmod function (no-op on Windows)

---
 include/fc/filesystem.hpp |  5 +++++
 src/filesystem.cpp        | 29 +++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/include/fc/filesystem.hpp b/include/fc/filesystem.hpp
index 9e8ebb9..4a05cd4 100644
--- a/include/fc/filesystem.hpp
+++ b/include/fc/filesystem.hpp
@@ -157,6 +157,11 @@ namespace fc {
   void     copy( const path& from, const path& to );
   void     rename( const path& from, const path& to );
   void     resize_file( const path& file, size_t s );
+  
+  // setuid, setgid not implemented.
+  // translates octal permission like 0755 to S_ stuff defined in sys/stat.h
+  // no-op on Windows.
+  void     chmod( const path& p, int perm );
 
   void     create_hard_link( const path& from, const path& to );
 
diff --git a/src/filesystem.cpp b/src/filesystem.cpp
index e06bb6e..db33f1c 100644
--- a/src/filesystem.cpp
+++ b/src/filesystem.cpp
@@ -17,6 +17,7 @@
 # include <ShlObj.h>
 #else
   #include <sys/types.h>
+  #include <sys/stat.h>
   #include <pwd.h>
 #endif
 
@@ -265,6 +266,34 @@ namespace fc {
                 ("f",f)("s",t)( "reason", fc::except_str() ) );
     }
   }
+
+  // setuid, setgid not implemented.
+  // translates octal permission like 0755 to S_ stuff defined in sys/stat.h
+  // no-op on Windows.
+  void chmod( const path& p, int perm )
+  {
+#ifndef WIN32
+    mode_t actual_perm = 
+      ((perm & 0400) ? S_IRUSR : 0)
+    | ((perm & 0200) ? S_IWUSR : 0)
+    | ((perm & 0100) ? S_IXUSR : 0)
+    
+    | ((perm & 0040) ? S_IRGRP : 0)
+    | ((perm & 0020) ? S_IWGRP : 0)
+    | ((perm & 0010) ? S_IXGRP : 0)
+    
+    | ((perm & 0004) ? S_IROTH : 0)
+    | ((perm & 0002) ? S_IWOTH : 0)
+    | ((perm & 0001) ? S_IXOTH : 0)
+    ;
+
+    int result = ::chmod( p.string().c_str(), actual_perm );
+    if( result != 0 )
+        FC_THROW( "chmod operation failed on ${p}", ("p",p) );
+#endif
+    return;
+  }
+
   void rename( const path& f, const path& t ) { 
      try {
   	    boost::filesystem::rename( boost::filesystem::path(f), boost::filesystem::path(t) );